void client_gets_file(int sockfd,TLV *tlv){
    printf("开始接收文件\n");
    tlv->tag = CMD_GETS;
    char filename[tlv->length+1];
    memcpy(filename,tlv->data,tlv->length);
    filename[tlv->length] = '\0';
    char recive_pathname[256];
    strcpy(recive_pathname,PATH);
    strcat(recive_pathname,filename);
    printf("接收文件的地址：%s\n",recive_pathname);
    send(sockfd,tlv,sizeof(tlv->length)+sizeof(tlv->tag)+tlv->length,MSG_NOSIGNAL);//传输指令
    recvfile(sockfd,recive_pathname);
    //        recvfile(sockfd,"/home/sfh/C++65_linux/ThreadPool/client/65Linuxday17_02_git2.e
    printf("接收完成\n");

}
